abstract |
In this multi-layer bottle, the outermost layer and innermost layer are configured from a polyester (Z1), a barrier layer is configured from a resin composition containing 40-99 parts by mass of a polyamide (X) and 1-60 parts by mass of a polyester (Z2), the resin composition is admixed with an alkali compound (A), and the resin composition further satisfies the following formulae (1) to (3): 0.01 ≤ P ≤ 6.5 …(1); 3.2 ≤ M ≤ 73.1 …(2); M ≥ 29.2 - 0.218α …(3) (in the formulae: P represents the molar concentration (μmol/g) of phosphorus atoms; M represents the molar concentration (μmol/g) of alkali (or alkaline earth) metal atoms; and α represents the parts by mass of the polyamide (X) contained in the resin composition). |